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Real Estate Variable Interest Entities (Details) (USD $)
In Millions, unless otherwise specified |
0 Months Ended | 0 Months Ended | |||||
|---|---|---|---|---|---|---|---|
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Jun. 15, 2011
|
Jun. 15, 2011
Six Fifty North Glebe Road [Member]
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Jun. 30, 2012
Six Fifty North Glebe Road [Member]
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Dec. 31, 2011
Six Fifty North Glebe Road [Member]
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Nov. 23, 2011
Braddock Gateway [Member]
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Jun. 30, 2012
Braddock Gateway [Member]
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Dec. 31, 2011
Braddock Gateway [Member]
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|
| Real Estate Properties [Line Items] | |||||||
| Estimated development costs | $ 45.0 | $ 95.3 | |||||
| Percentage of capital contribution through debt | 70.00% | 70.00% | 70.00% | ||||
| Variable interest entity, qualitative or quantitative information, ownership percentage | 90.00% | 95.00% | |||||
| Percentage of residential property to be leased to achieve project stabilization stage | 90.00% | ||||||
| Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners | 10.00% | 5.00% | |||||
| Land and capitalized development costs related to joint ventures | 14.5 | 13.4 | 16.0 | 14.4 | |||
| Accounts payable and accrued liabilities related to joint ventures | $ 0.3 | $ 0.1 | $ 0.4 | $ 0.2 | |||